Articles | Volume 29, issue 14
https://doi.org/10.5194/hess-29-3341-2025
https://doi.org/10.5194/hess-29-3341-2025
Research article
 | 
30 Jul 2025
Research article |  | 30 Jul 2025

Global catalog of soil moisture droughts over the past four decades

Jan Řehoř, Rudolf Brázdil, Oldřich Rakovec, Martin Hanel, Milan Fischer, Rohini Kumar, Jan Balek, Markéta Poděbradská, Vojtěch Moravec, Luis Samaniego, Yannis Markonis, and Miroslav Trnka

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Cited articles

Afroz, M., Chen, G., and Anandhi, A.: Drought- and heatwave-associated compound extremes: A review of hotspots, variables, parameters, drivers, impacts, and analysis frameworks, Front. Earth Sci., 10, 914437, https://doi.org/10.3389/feart.2022.914437, 2023. 
Anderson, M. C., Hain, C., Wardlow, B., Pimstein, A., Mecikalski, J. R., and Kustas, W. P.: Evaluation of drought indices based on thermal remote sensing of evapotranspiration over the continental United States, J. Climate, 24, 2025–2044, https://doi.org/10.1175/2010JCLI3812.1, 2011. 
Andreadis, K. M. and Lettenmaier D. P.: Trends in 20th century drought over the continental United States, Geophys. Res. Lett., 33, L10403, https://doi.org/10.1029/2006GL025711, 2006. 
Ankerst, M., Breunig, M. M., Kriegel, H.-P., and Sander, J.: OPTICS: ordering points to identify the clustering structure, SIGMOD Rec., 28, 49–60, https://doi.org/10.1145/304181.304187, 1999. 
Arias, P. A., Rivera, J. A., Sörensson, A. A., Zachariah, M., Barnes, C., Philip, S., Kew, S., Vautard, R., Koren, G., Pinto, I., Vahlberg, M., Singh, R., Raju, E., Li, S., Yang, W., Vecchi, G. A., and Otto, F. E. L.: Interplay between climate change and climate variability: the 2022 drought in Central South America, Clim. Change, 177, 6, https://doi.org/10.1007/s10584-023-03664-4, 2024. 
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We present a robust method for identification and classification of global land drought events (GLDEs) based on soil moisture. Two models were used to calculate soil moisture and delimit soil drought over global land from 1980–2022, with clusters of 775 and 630 GLDEs. Using four spatiotemporal and three motion-related characteristics, we categorized GLDEs into seven severity and seven dynamic categories. The frequency of GLDEs has generally increased in recent decades.
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